Khalil Oliver was 20 when a verbal dispute in Kensington, Philadelphia, turned deadly on the evening of Friday, July 22, 2011. The confrontation on the 2200 block of Emerald Street ended when an unidentified man shot Oliver twice — once behind his left ear and once in the back. He was taken to Temple University Hospital and pronounced dead at 5:05 p.m. on Saturday, July 23, 2011.

Philadelphia police interviewed witnesses soon after the shooting, but no arrests have ever been made and no suspects have been publicly identified. The case has grown cold, leaving Oliver’s family without answers.

If anyone in Kensington that July night remembers seeing or hearing anything about the dispute on Emerald Street, please come forward with information.